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A Latency-Aware and Fault-Tolerant Framework for Resource Scheduling and Data Management in Fog-Enabled Smart City Transportation Systems

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Computers, Materials & Continua 2025年第1期82卷 1377-1399页

作者： Ibrar Afzal Noor ul amin Zulfiqar Ahmad Abdulmohsen Algarni Department of Computer Science and Information Technology Hazara UniversityMansehra21300Pakistan Department of Computer Science King Khalid UniversityAbha61421Saudi Arabia

Thedeployment of the Internet of Things(IoT)with smart sensors has facilitated the emergence of fog computing as an important technology for delivering services to smart environments such as campuses,smart cities,and smart transportation *** computing tackles a range of challenges,including processing,storage,bandwidth,latency,and reliability,by locally distributing secure information through end *** of endpoints,fog nodes,and back-end cloud infrastructure,it provides advanced capabilities beyond traditional cloud *** smart environments,particularly within smart city transportation systems,the abundance of devices and nodes poses significant challenges related to power consumption and system *** address the challenges of latency,energy consumption,and fault tolerance in these environments,this paper proposes a latency-aware,faulttolerant framework for resource scheduling and data management,referred to as the FORD framework,for smart cities in fog *** framework is designed to meet the demands of time-sensitive applications,such as those in smart transportation *** FORD framework incorporates latency-aware resource scheduling to optimize task execution in smart city environments,leveraging resources from both fog and cloud *** simulation-based executions,tasks are allocated to the nearest available nodes with minimum *** the event of execution failure,a fault-tolerantmechanism is employed to ensure the successful completion of *** successful execution,data is efficiently stored in the cloud data center,ensuring data integrity and reliability within the smart city ecosystem.

关键词： Fog computing smart cities smart transportation data management fault tolerance resource scheduling

Quantum photodetachment of hydrogen negative ion in a harmonic potential subjected to static electric field

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Chinese Physics B 2019年第2期28卷 179-184页

作者： Azmat Iqbal Kiran Humayun Sana Maqsood Saba Jawaid Afaq Ahmad amin Ur Rahman bakht amin.bacha Department of Physics The University of LahoreRaiwind Road CampusLahorePakistan Center of Excellence in Solid State Physics University of the PunjabLahorePakistan Department of Physics RIPHAH International University IslamabadPakistan Department of Physics University of Malakand Chakdara Dir(L)Pakistan

Photodetachment of negative ions has attracted immense interest owing to its fundamental nature and practical implications with regard to technology. In this study, we explore the quantum dynamics of the photodetachment cross section of negative ion of hydrogen H-in the perturbed one dimensional linear harmonic potential via static electric field. To this end,the quantum formula for total photodetachment cross section of the H-ion is derived by calculating the dipole matrix element in spherical coordinates. In order to obtain the detached electron wave function, we have solved the time-independent Schr¨odinger wave equation for the perturbed Hamiltonian of the harmonic oscillator in momentum representation. To acquire the corresponding normalized final state detached electron wave function in momentum space, we have employed an approach analogous to the WKB(Wenzel–Kramers–Brillouin) approximation. The resulting analytical formula of total photodetachment cross section depicts interesting oscillator structure that varies considerably with incident-photon energy,oscillator potential frequency, and electric field strength as elucidated by the numerical results. The current problem having close analogy with the Stark effect in charged harmonic oscillator may have potential implications in atomic and molecular physics and quantum optics.

关键词： photodetachment cross section harmonic oscillator potential Stark effect time-independent Schrodinger equation WKB approximation

Superposition of Stationary Wave Fields Via Atom Microscopy

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Communications in Theoretical Physics 2015年第3期63卷 340-346页

作者： Hizbullah Anwar Ali khan Naveed Khan Iftikhar Ahmad bakht amin.bacha Department of Physics University of Malakand Chakdara Department of Physics Hazara University

We investigate one-dimensional position microscopy of a three-level atom moving through a stationary wave region under the condition of electromagnetically induced *** precise position information of an atom is observed on the resonance absorption and dispersion distribution spectrum of a weak probe *** and multiple localization peaks are observed in specific directions of the corresponding wave numbers and phase of the standing wave *** strength of space-independent Rabi frequency reduces the position uncertainty in the localized peaks without disturbing the probability of the *** a hot atomic medium the localized probability of an atom is reduced which depends upon the temperature of that *** results provide useful applications in the development of laser cooling,atom nanolithography and Bose-Einstein condensation.

关键词： 1D atom localization superposition of standing waves fields

Atom Microscopy via Dual Resonant Superposition

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Communications in Theoretical Physics 2015年第12期64卷 741-746页

作者： M.S.Abdul Jabar bakht amin.bacha M.Jalaluddin Iftikhar Ahmad Department of Physics University of Malakand

An M-type Rb^(87) atomic system is proposed for one-dimensional atom microscopy under the condition of Electromagnetically Induced ***-localization of the atom in the absorption spectrum while its delocalization in the dispersion spectrum is observed due to the dual superposition effect of the resonant *** observed minimum uncertainty peaks will find important applications in Laser cooling,creating focused atom beams,atom nanolithography,and in measurement of the center-of-mass wave function of moving atoms.

关键词： atom microscopy resonant fields susceptibility

Spectral Hole Burning via Kerr Nonlinearity

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Communications in Theoretical Physics 2015年第10期64卷 473-478页

作者： Anwar Ali Khan M.S.Abdul Jabar M.Jalaluddin bakht amin.bacha Iftikhar Ahmad Department of Physics University of Malakand

Spectral hole burning is investigated in an optical medium in the presence of Doppler broadening and Kerr nonlinearity. The Kerr nonlinearity generates coherent hole burning in the absorption spectrum. The higher order Kerr nonlinearity enhances the typical lamb dip of the hole. Normal dispersion in the hole burning region while Steep anomalous dispersion between the two hole burning regions also enhances with higher order Kerr effect. A large phase shift creates large delay or advancement in the pulse propagation while no distortion is observed in the pulse. These results provide significant steps to improve optical memory, telecom devices, preservation of information and image quality.

关键词： spectral hole burning Kerr nonlinearity Doppler br

Efficient two-dimensional atom localization in a five-level conductive chiral atomic medium via birefringence beam absorption spectrum

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Communications in Theoretical Physics 2021年第1期73卷 25-34页

作者： Sajid Ali Muhammad Idrees Bakth amin.bacha Arif Ullah Muhammad Haneef Lab of Theoretical Physics Department of PhysicsHazara UniversityMansehra 21300Pakistan Quantum Optics and Quantum Information Research Group Department of PhysicsUniversity of MalakandChakdara Dir(L)Khyber PakhtunkhwaPakistan Zhejiang Province Key Laboratory of Quantum Technology and Device Department of PhysicsZhejiang UniversityHangzhou 310027China

We have theoretically investigated two-dimensional atom localization using the absorption spectra of birefringence beams of light in a single wavelength *** atom localization is controlled and modified through tunneling effect in a conductive chiral atomic medium with absorption spectra of birefringent *** significant localization peaks are investigated in the left and right circularly polarized *** and double localized peaks are observed in different quadrants with minimum uncertainty and significant *** localized probability is modified by controlling birefringence and tunneling *** results may be useful for the capability of optical microscopy and atom imaging.

关键词： 2D atom localization birefringence beam absorption chiral atomic medium

Spatial-dependent probe transmission based high-precision two-dimensional atomic localization

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Communications in Theoretical Physics 2021年第4期73卷 69-74页

作者： Muhammad Idrees Humaira Kalsoom Bakth amin.bacha Arif Ullah Li-Gang Wang Zhejiang Province Key Laboratory of Quantum Technology and Device Department of PhysicsZhejiang UniversityHangzhou 310027China Quantum Optics and Quantum Information Research Group Department of PhysicsUniversity of MalakandChakdara Dir(L)Khyber PakhtunkhwaPakistan Department of Mathematics Zhejiang Normal UniversityJinhua 321004China

Herein,we propose a scheme for the realization of two-dimensional atomic localization in aλ-type three-level atomic medium such that the atom interacts with the two orthogonal standing-wave fields and a probe *** of the spatially dependent atom-field interaction,the information about the position of the atom can be obtained by monitoring the probe transmission spectra of the weak probe field for the first time.A single and double sharp localized peaks are observed in the one-wavelength *** have theoretically archived high-resolution and high-precision atomic localization within a region smaller thanλ/25×λ/*** results may have potential applications in the field of nano-lithography and advance laser cooling technology.

关键词： 2D atomic localization probe transmission spectra standing-wave fields three-level atomic medium

Advanced Functional Electromagnetic Shielding Materials:A Review Based on Micro‑Nano Structure Interface Control of Biomass Cell Walls

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Nano-Micro Letters 2025年第1期17卷 98-134页

作者： Yang Shi Mingjun Wu Shengbo Ge Jianzhang Li Anoud Saud Alshammari Jing Luo Mohammed A.amin Hua Qiu Jinxuan Jiang Yazeed M.Asiri Runzhou Huang Hua Hou Zeinhom M.El‑Bahy Zhanhu Guo Chong Jia Kaimeng Xu Xiangmeng Chen Co‑Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037People’s Republic of China State Key Laboratory of Efficient Production of Forest Resourced Beijing Forestry UniversityQinghua East Road 35Haidian DistrictBeijing 100083People’s Republic of China Department of Physics Faculty of Sciences‑ArarNorthern Border UniversityArar 91431Saudi Arabia Department of Chemistry College of ScienceTaif UniversityP.O.Box 1109921944 TaifSaudi Arabia Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’anShaanxi 710072People’s Republic of China Integrated Composites Lab Department of Mechanical and Construction EngineeringNorthumbria UniversityNewcastle Upon Tyne NE18STUK College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024People’s Republic of China Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr CityCairo 11884Egypt Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products International Joint Research Center for Biomass MaterialsSouthwest Forestry UniversityKunming 650224People’s Republic of China School of Science Henan Agricultural UniversityZhengzhou 450002People’s Republic of China

Research efforts on electromagnetic interference(EMI)shielding materials have begun to converge on green and sustainable biomass *** materials offer numerous advantages such as being lightweight,porous,and *** to their porous nature,interfacial compatibility,and electrical conductivity,biomass materials hold significant potential as EMI shielding *** concerted efforts on the EMI shielding of biomass materials have been reported,this research area is still relatively new compared to traditional EMI shielding *** particular,a more comprehensive study and summary of the factors influencing biomass EMI shielding materials including the pore structure adjustment,preparation process,and micro-control would be *** preparation methods and characteristics of wood,bamboo,cellulose and lignin in EMI shielding field are critically discussed in this paper,and similar biomass EMI materials are summarized and *** composite methods and fillers of various biomass materials were *** paper also highlights the mechanism of EMI shielding as well as existing prospects and challenges for development trends in this field.

关键词： Biomass materials Electromagnetic interference shielding Micro-nano structure interface control Conductivity

Surface plasmon polariton at the interface of dielectric and graphene medium using Kerr effect

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Chinese Physics B 2018年第11期27卷 522-527页

作者： bakhtawar Muhammad Haneef B A bacha H Khan M Atif Lab of Theoretical Physics Department of Physics Hazara University Department of Physics University of Malakand

We theoretically investigate the control of surface plasmon polariton（SPP） generated at the interface of dielectric and graphene medium under Kerr nonlinearity. The controlled Kerr nonlinear signal of probe light beam in a dielectric medium is used to generate SPPs at the interface of dielectric and graphene medium. The positive, negative absorption, and dispersion properties of SPPs are modified and controlled by the control and Kerr fields. A large amplification（negative absorption） is noted for SPPs under the Kerr nonlinearity. The normal/anomalous slope of dispersion and propagation length of SPPs is modified and controlled with Kerr nonlinearity. This leads to significant variation in slow and fast SPP propagation. The controlled slow and fast SPP propagation may predict significant applications in nano-photonics, optical tweezers, photovoltaic devices, plasmonster, and sensing technology.

关键词： surface plasmon polariton Kerr nonlinearity graphene